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This paper investigates the fresh and hardened properties of cement mortar using calcined eggshell powder (CESP) calcined at 600 °C and 800 °C. CESP was substituted for cement at 0%, 5%, 10%, and 15%. Flow table, setting time, dry bulk density, and compressive strength test were conducted according to ASTM standards. A total of 63 cube specimens (50 × 50 × 50 mm) were tested for compressive strength at 3, 7, and 28 days of curing. Results indicate a notable increase in CaO content for CESP at 600 °C and 800 °C compared to raw eggshell powder, with increments of 15% and 24%, respectively. Higher CESP content led to faster setting times, increased flowability, and reduced dry bulk density of the cement mortar. A 5% CESP substitution yielded compressive strength similar to the control, but higher percentages resulted in reduced strength. CESP calcined at 800 °C resulted in shorter final setting times, higher dry bulk density, and greater compressive strength compared to CESP calcined at 600 °C. A strong polynomial correlation was also observed between dry bulk density and compressive strength for the cement mortar with CESP. The study concludes that CESP is a viable cement substitute and suggests further research into hybrid materials to enhance these properties.

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Experimental Study on Properties of Cement Mortar Containing Calcined Eggshell Powder at 600 °C and 800 °C

  • 会议论文

  • 发表日期：

    2026年

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  • J. Johnycal,
  • Oh Chai Lian,
  • Mohd Raizamzamani Md Zain,
  • Nurizaty Zuhan,
  • Ni Nyoman Kencanawati,
  • Amiruddin Mishad

摘要

This paper investigates the fresh and hardened properties of cement mortar using calcined eggshell powder (CESP) calcined at 600 °C and 800 °C. CESP was substituted for cement at 0%, 5%, 10%, and 15%. Flow table, setting time, dry bulk density, and compressive strength test were conducted according to ASTM standards. A total of 63 cube specimens (50 × 50 × 50 mm) were tested for compressive strength at 3, 7, and 28 days of curing. Results indicate a notable increase in CaO content for CESP at 600 °C and 800 °C compared to raw eggshell powder, with increments of 15% and 24%, respectively. Higher CESP content led to faster setting times, increased flowability, and reduced dry bulk density of the cement mortar. A 5% CESP substitution yielded compressive strength similar to the control, but higher percentages resulted in reduced strength. CESP calcined at 800 °C resulted in shorter final setting times, higher dry bulk density, and greater compressive strength compared to CESP calcined at 600 °C. A strong polynomial correlation was also observed between dry bulk density and compressive strength for the cement mortar with CESP. The study concludes that CESP is a viable cement substitute and suggests further research into hybrid materials to enhance these properties.